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#!/usr/bin/env python |
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# Last modified: Time-stamp: <2008-02-15 10:51:00 jcleary> |
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""" |
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how to parse data, and assert what data and info goes into |
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creating and updating monthly netcdf files |
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|
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Texas Weather Instruments - Weather Processing System (WPS) met data |
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delimited ASCII file like: |
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year mon day hhmm epoch tmean hmean wsmean wdmean barom dewPt wchill rrmean rday rmonth rterm |
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parser : output delimited ASCII file from onsite perl script |
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creator : lat, lon, time, air_temp, humidity, wspd, wdir, air_pressure, |
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dew_temp, wchill, rainfall_rate, rainfall_day, rainfall_month, rainfall_term |
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updater : time, air_temp, humidity, wspd, wdir, air_pressure, |
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dew_temp, wchill, rainfall_rate, rainfall_day, rainfall_month, rainfall_term |
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|
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Examples |
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-------- |
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|
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>> (parse, create, update) = load_processors('proc_jpier_ascii_met') |
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or |
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>> si = get_config(cn+'.sensor_info') |
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>> (parse, create, update) = load_processors(si['met']['proc_module']) |
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|
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>> lines = load_data(filename) |
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>> data = parse(platform_info, sensor_info, lines) |
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>> create(platform_info, sensor_info, data) or |
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>> update(platform_info, sensor_info, data) |
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|
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""" |
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|
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from raw2proc import * |
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from procutil import * |
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from ncutil import * |
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|
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now_dt = datetime.utcnow() |
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now_dt.replace(microsecond=0) |
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|
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def parser(platform_info, sensor_info, lines): |
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""" |
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parse and assign met data from JPIER TWS WPS text file |
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""" |
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i = 0 |
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|
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# drop header row from incoming lines list |
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if lines[0].startswith('year',0,5): |
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print "... Header row present, skipping ..." |
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del lines[0] |
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|
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for line in lines: |
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# split line and parse float and integers |
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tws = [] |
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# data row looks like: |
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# 2008 1 1 0000 1199163600 17.2 84.8 0.00 0 1015.10 14.4 17.2 1729.1 0.0 0.0 1031.5 |
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|
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sw = re.split('\s+', line) |
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for s in sw: |
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m = re.search(REAL_RE_STR, s) |
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if m: |
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tws.append(float(m.groups()[0])) |
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# assign specific fields |
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n = len(tws) |
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# get sample datetime from data |
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sample_str = '%04d-%02d-%02d %04d:00' % tuple(tws[0:4]) |
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sample_dt = scanf_datetime(sample_str, fmt='%Y-%m-%d %H%M:%S') |
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# datetime(*strptime(sample_str, "%y-%m-%d %H:%M:%S")[0:6]) |
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|
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air_temp = tws[5] # Air Temperature (deg F) |
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humidity = tws[6] # Humidity (%) |
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dew_temp = tws[10] # Dew Point (deg F) |
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air_pressure = tws[9] # Air Pressure (Tmean, sec) |
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wspd = tws[7] # Mean Wind Speed (knots) |
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wdir = tws[8] # Mean Wind Direction (deg from N) |
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wchill = tws[11] # Wind Chill (deg F) |
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rainfall_rate = tws[12] # Rainfall Rate () |
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rainfall_day = tws[13] # Rainfall amount last 24 hours (in) |
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rainfall_month = tws[14] # Rainfall amount last month (in) |
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rainfall_term = tws[15] # Rainfall amount since installation (in) |
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|
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# set up dict of data if first line |
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if i==0: |
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data = { |
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'dt' : numpy.array(numpy.ones((len(lines),), dtype=object)*numpy.nan), |
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'time' : numpy.array(numpy.ones((len(lines),), dtype=long)*numpy.nan), |
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'air_temp' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'humidity' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'dew_temp' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'air_pressure' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'wspd' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'wdir' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'wchill' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'rainfall_rate' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'rainfall_day' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'rainfall_month' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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'rainfall_term' : numpy.array(numpy.ones((len(lines)), dtype=float)*numpy.nan), |
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} |
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|
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data['dt'][i] = sample_dt # sample datetime |
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data['time'][i] = dt2es(sample_dt) # sample time in epoch seconds |
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data['air_temp'][i] = air_temp |
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data['humidity'][i] = humidity |
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data['dew_temp'][i] = dew_temp |
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data['air_pressure'][i] = air_pressure |
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data['wspd'][i] = wspd |
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data['wdir'][i] = wdir |
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data['wchill'][i] = wchill |
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data['rainfall_rate'][i] = rainfall_rate |
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data['rainfall_day'][i] = rainfall_day |
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data['rainfall_month'][i] = rainfall_month |
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data['rainfall_term'][i] = rainfall_term |
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i = i+1 |
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return data |
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|
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def creator(platform_info, sensor_info, data): |
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# |
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# |
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title_str = sensor_info['description']+' at '+ platform_info['location'] |
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global_atts = { |
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'title' : title_str, |
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'institution' : 'Unversity of North Carolina at Chapel Hill (UNC-CH)', |
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'institution_url' : 'http://nccoos.org', |
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'institution_dods_url' : 'http://nccoos.org', |
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'metadata_url' : 'http://nccoos.org', |
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'references' : 'http://nccoos.org', |
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'contact' : 'Jesse Cleary (jcleary@email.unc.edu)', |
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# |
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'source' : 'TWS Met station observation', |
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'history' : 'raw2proc using ' + sensor_info['process_module'], |
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'comment' : 'File created using pycdf'+pycdfVersion()+' and numpy '+pycdfArrayPkg(), |
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# conventions |
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'Conventions' : 'CF-1.0; SEACOOS-CDL-v2.0', |
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# SEACOOS CDL codes |
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'format_category_code' : 'fixed-point', |
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'institution_code' : platform_info['institution'], |
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'platform_code' : platform_info['id'], |
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'package_code' : sensor_info['id'], |
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# institution specific |
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'project' : 'North Carolina Coastal Ocean Observing System (NCCOOS)', |
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'project_url' : 'http://nccoos.org', |
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# timeframe of data contained in file yyyy-mm-dd HH:MM:SS |
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'start_date' : data['dt'][0].strftime("%Y-%m-%d %H:%M:%S"), |
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'end_date' : data['dt'][-1].strftime("%Y-%m-%d %H:%M:%S"), |
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'release_date' : now_dt.strftime("%Y-%m-%d %H:%M:%S"), |
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# |
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'creation_date' : now_dt.strftime("%Y-%m-%d %H:%M:%S"), |
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'modification_date' : now_dt.strftime("%Y-%m-%d %H:%M:%S"), |
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'process_level' : 'level1', |
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# |
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# must type match to data (e.g. fillvalue is real if data is real) |
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'_FillValue' : -99999., |
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} |
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|
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var_atts = { |
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# coordinate variables |
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'time' : {'short_name': 'time', |
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'long_name': 'Sample Time', |
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'standard_name': 'time', |
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'units': 'seconds since 1970-1-1 00:00:00 -0', # UTC |
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'axis': 'T', |
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}, |
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'lat' : {'short_name': 'lat', |
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'long_name': 'Latitude in Decimal Degrees', |
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'standard_name': 'latitude', |
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'reference':'geographic coordinates', |
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'units': 'degrees_north', |
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'valid_range':(-90.,90.), |
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'axis': 'Y', |
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}, |
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'lon' : {'short_name': 'lon', |
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'long_name': 'Longtitude in Decimal Degrees', |
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'standard_name': 'longtitude', |
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'reference':'geographic coordinates', |
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'units': 'degrees_east', |
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'valid_range':(-180.,180.), |
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'axis': 'Y', |
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}, |
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'z' : {'short_name': 'z', |
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'long_name': 'Height', |
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'standard_name': 'height', |
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'reference':'zero at sea-surface', |
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'positive': 'up', |
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'units': 'm', |
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'axis': 'Z', |
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}, |
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# data variables |
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|
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'air_temp' : {'short_name': 'air_temp', |
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'long_name': 'Air Temperature', |
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'standard_name': 'air_temperature', |
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'units': 'degrees Celsius', |
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}, |
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'humidity' : {'short_name': 'humidity', |
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'long_name': 'Humidity', |
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'standard_name': 'humidity', |
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'units': '%', |
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}, |
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'dew_temp' : {'short_name': 'dew_temp', |
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'long_name': 'Dew Temperature', |
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'standard_name': 'dew_temp', |
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'units': 'degrees Celsius', |
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}, |
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'air_pressure' : {'short_name': 'air_pressure', |
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'long_name': 'Air Pressure at Barometer Height', |
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'standard_name': 'air_pressure', |
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'units': 'hPa', |
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}, |
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'wspd' : {'short_name': 'wspd', |
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'long_name': 'Wind Speed', |
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'standard_name': 'wind_speed', |
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'units': 'm s-1', |
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'can_be_normalized': '?', |
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}, |
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'wdir' : {'short_name': 'wdir', |
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'long_name': 'Wind Direction from', |
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'standard_name': 'wind_from_direction', |
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'reference': 'clockwise from True North', |
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'valid_range': '0., 360', |
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'units': 'degrees', |
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}, |
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'wchill' : {'short_name': 'wchill', |
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'long_name': 'Wind Chill', |
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'standard_name': 'wind_chill', |
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'units': 'degrees Celsius', |
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}, |
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'rainfall_rate' : {'short_name': 'rR', |
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'long_name': 'Rainfall Rate', |
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'standard_name': 'rainfall_rate', |
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'units': 'mm hr-1', |
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}, |
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'rainfall_day' : {'short_name': 'rD', |
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'long_name': 'Rainfall Day', |
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'standard_name': 'rainfall_day', |
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'units': 'mm', |
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}, |
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'rainfall_month' : {'short_name': 'rM', |
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'long_name': 'Rainfall Month', |
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'standard_name': 'rainfall_month', |
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'units': 'mm', |
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}, |
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'rainfall_term' : {'short_name': 'rT', |
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'long_name': 'Rainfall Term', |
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'standard_name': 'rainfall_term', |
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'units': 'mm', |
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}, |
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} |
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# integer values |
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ntime=NC.UNLIMITED |
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nlat=1 |
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nlon=1 |
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nz=1 |
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|
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# dimension names use tuple so order of initialization is maintained |
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dim_inits = ( |
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('ntime', NC.UNLIMITED), |
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('nlat', 1), |
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('nlon', 1), |
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('nz', 1) |
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) |
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|
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# using tuple of tuples so order of initialization is maintained |
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# using dict for attributes order of init not important |
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# use dimension names not values |
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# (varName, varType, (dimName1, [dimName2], ...)) |
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var_inits = ( |
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# coordinate variables |
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('time', NC.INT, ('ntime',)), |
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('lat', NC.FLOAT, ('nlat',)), |
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('lon', NC.FLOAT, ('nlon',)), |
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('z', NC.FLOAT, ('nz',)), |
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# data variables |
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('air_temp', NC.FLOAT, ('ntime',)), |
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('humidity', NC.FLOAT, ('ntime',)), |
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('dew_temp', NC.FLOAT, ('ntime',)), |
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('air_pressure', NC.FLOAT, ('ntime',)), |
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('wspd', NC.FLOAT, ('ntime',)), |
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('wdir', NC.FLOAT, ('ntime',)), |
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('wchill', NC.FLOAT, ('ntime',)), |
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('rainfall_rate', NC.FLOAT, ('ntime',)), |
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('rainfall_day', NC.FLOAT, ('ntime',)), |
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('rainfall_month', NC.FLOAT, ('ntime',)), |
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('rainfall_term', NC.FLOAT, ('ntime',)), |
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) |
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|
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# subset data only to month being processed (see raw2proc.process()) |
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i = data['in'] |
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|
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# var data |
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var_data = ( |
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('lat', platform_info['lat']), |
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('lon', platform_info['lon']), |
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('z', 6), |
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# |
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('time', data['time'][i]), |
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('air_temp', data['air_temp'][i]), |
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('humidity', data['humidity'][i]), |
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('dew_temp', data['dew_temp'][i]), |
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('air_pressure', data['air_pressure'][i]), |
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('wspd', data['wspd'][i]), |
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('wdir', data['wdir'][i]), |
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('wchill', data['wchill'][i]), |
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('rainfall_rate', data['rainfall_rate'][i]), |
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('rainfall_day', data['rainfall_day'][i]), |
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('rainfall_month', data['rainfall_month'][i]), |
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('rainfall_term', data['rainfall_term'][i]), |
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) |
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|
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return (global_atts, var_atts, dim_inits, var_inits, var_data) |
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|
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def updater(platform_info, sensor_info, data): |
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# |
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global_atts = { |
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# update times of data contained in file (yyyy-mm-dd HH:MM:SS) |
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# last date in monthly file |
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'end_date' : data['dt'][-1].strftime("%Y-%m-%d %H:%M:%S"), |
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'release_date' : now_dt.strftime("%Y-%m-%d %H:%M:%S"), |
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# |
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'modification_date' : now_dt.strftime("%Y-%m-%d %H:%M:%S"), |
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} |
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|
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# data variables |
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# update any variable attributes like range, min, max |
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var_atts = {} |
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# var_atts = { |
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# 'u': {'max': max(data.u), |
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# 'min': min(data.v), |
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# }, |
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# 'v': {'max': max(data.u), |
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# 'min': min(data.v), |
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# }, |
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# } |
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|
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# subset data only to month being processed (see raw2proc.process()) |
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i = data['in'] |
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|
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# data |
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var_data = ( |
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('time', data['time'][i]), |
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('air_temp', data['air_temp'][i]), |
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('humidity', data['humidity'][i]), |
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('dew_temp', data['dew_temp'][i]), |
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('air_pressure', data['air_pressure'][i]), |
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('wspd', data['wspd'][i]), |
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('wdir', data['wdir'][i]), |
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('wchill', data['wchill'][i]), |
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('rainfall_rate', data['rainfall_rate'][i]), |
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('rainfall_day', data['rainfall_day'][i]), |
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('rainfall_month', data['rainfall_month'][i]), |
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('rainfall_term', data['rainfall_term'][i]), |
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) |
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|
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return (global_atts, var_atts, var_data) |
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|
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# |
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